Magnetic powder material comprising iron oxide particles with a

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter

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75 5AA, 148 315, 148 3155, 427132, 428900, 428928, 252 6256, H01F 102, C04B 3500, C22B 104

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active

040693678

ABSTRACT:
A powder magnetic material for use as a magnetic recording medium and a method of its manufacture are disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electric resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, manganese, nickel, zinc and iron is deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3 to provide a powdered magnetic material of high coercivity, high magnetic flux density and low electric resistance.

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patent: 3574683 (1971-04-01), Johnston
patent: 3661556 (1972-05-01), Jolley et al.
patent: 3702270 (1972-11-01), Kawasaki et al.
patent: 3720618 (1973-03-01), Toda et al.
patent: 3748270 (1973-07-01), Hwang
patent: 3755796 (1973-08-01), Griest

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